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642-845: Optimizing Converged Cisco NetworksProduct Description:
Exam Number/Code: 642-845
Exam Name: CCNP

“CCNP ’s Optimizing Converged Cisco Networks”, also known as 642-845 exam, is a Cisco certification.
Preparing for the 642-845 exam? Searching 642-845 Test Questions, 642-845 Practice Exam, 642-845 Dumps?
With the complete collection of questions and answers, TestInside has assembled to take you through 204 questions to your 642-845 Exam preparation. In the 642-845 exam resources, you will cover every field and category in CCNP helping to ready you for your successful Cisco Certification.

642-845 ONT
Optimizing Converged Cisco Networks

Exam Number: 642-845
Associated Certifications: CCNP
Duration: 90 minutes
Available Languages: English
Click Here to Register: Pearson VUE
Exam Policies: Read current policies and requirements
Exam Tutorial: Review type of exam questions

Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The Optimizing Converged Cisco Networks (642-845 ONT) is a qualifying exam for the Cisco Certified Network Professional CCNP®. The ONT 642-845 exam will certify that the successful candidate has important knowledge and skills in optimizing and providing effective QOS techniques for converged networks. The exam topics include implementing a VOIP network, implementing QoS on converged networks, specific IP QoS mechanisms for implementing the DiffServ QoS model, AutoQoS, wireless security and basic wireless management.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Describe Cisco VoIP implementations.
Describe the functions and operations of a VoIP network (e.g., packetization, bandwidth considerations, CAC, etc.).
Describe and identify basic voice components in an enterprise network (e.g. Gatekeepers, Gateways, etc.)

Describe QoS considerations.
Explain the necessity of QoS in converged networks (e.g., bandwidth, delay, loss, etc.).
Describe strategies for QoS implementations (e.g. QoS Policy, QoS Models, etc.).

Describe DiffServ QoS implementations.
Describe classification and marking (e.g., CoS, ToS, IP Precedence, DSCP, etc.).
Describe and configure NBAR for classification.
Explain congestion management and avoidance mechanisms (e.g., FIFO, PQ, WRR, WRED, etc.).
Describe traffic policing and traffic shaping (i.e., traffic conditioners).
Describe Control Plane Policing.
Describe WAN link efficiency mechanisms (e.g., Payload/Header Compression, MLP with interleaving, etc.).
Describe and configure QoS Pre-Classify.

Implement AutoQoS.
Explain the functions and operations of AutoQoS.
Describe the SDM QoS Wizard.
Configure, verify, and torubleshoot AutoQoS implementations (i.e., MQC).

Implement WLAN security and management.
Describe and Configure wireless security on Cisco Clients and APs (e.g., SSID, WEP, LEAP, etc.).
Describe basic wireless management (e.g., WLSE and WCS). Configure and verify basic WCS configuration (i.e., login, add/review controller/AP status, security, and import/review maps).
Describe and configure WLAN QoS.

QUESTION 27:
Certkiller has several offices around the country. They have deployed a VOIP
network with Cisco Unified CallManager in a multisite centralized configuration
but there is a requirement to place a call agent at some of the remote sites. Which
IOS gateway feature should be deployed at the remote site to enable local call
control?
A. Survivable Remote Site Telephony (SRST)
B. Gatekeeper multizone
C. Cisco Unified CallManager Express (CME)
D. Call Admission Control (CAC)
E. Automatic Alternate Routing (AAR)
F. None of the above
Answer: C
Explanation:
Cisco Unified CallManager is the IP-based PBX in an IP telephony solution. It acts as a
call agent for IP phones and MGCP gateways and can also interact with H.323 or SIP
devices using their protocols. For redundancy and load sharing, multiple Cisco Unified
CallManager servers operate in a cluster. From an administration perspective, the whole
cluster is a single logical instance.
Cisco IOS routers can permanently act as a call agent for IP phones. The feature that
provides this functionality is Cisco Unified CallManager Express. With Cisco Unified
CallManager Express, Cisco Unified CallManager functionality is provided by the router.
If the router is also a voice gateway, it combines IP telephony and VoIP gateway
functionality in a single box.
Cisco IOS gateways also support other features, such as call preservation (Real-Time
Transport Protocol [RTP] stream) in case of a lost signaling channel, dual tone
multifrequency (DTMF) relay capabilities, supplementary services support (for user
functions, such as hold, transfer, and conferencing), and fax and modem support.
QUESTION 28:
Two Certkiller phones connect to Cisco Gateway routers as shown below:
Certkiller 1 configuration exhibit:
Certkiller 2 configuration exhibit:
Study the exhibits shown above. Both routers have been configured as VoIP
gateways. They must also support traditional telephony devices to connect to analog
telephones. Which two configuration changes would correctly support the voice
requirements? (Select two)
A. On each router, under the dial-peer voice 1 pots configuration, add the port 1/0/0
command.
B. Under the dial-peer voice 2 voip configuration, change the destination pattern of 1111
to 2222 on the Certkiller 1 router, and 2222 to 1111 on the Certkiller 2 router.
C. Under the dial-peer voice 2 voip configuration, change the destination target address
of 10.2.2.2 to 10.1.1.1 on the Certkiller 1 router, and the destination target address of
10.1.1.1 to 10.2.2.2 on the Certkiller 2 router.
D. On each router, configure dial-peer voice 1 as a voip connection and configure
dial-peer voice 2 as a pots connection.
E. On each router, under the dial-peer voice 1 pots configuration, add the port fa0/0
command.
F. Under the dial-peer voice 1 pots configuration, change the destination pattern of 1111
to 2222 on the Certkiller 1 router, and 2222 to 1111 on the Certkiller 2 router.
Answer: A, B
Explanation:

Command Description
dial-peer voicetag type Use the dial-peer voice command to
enter the dial peer subconfiguration
mode. The tag value is a number that
has to be unique for all dial peers
within the same gateway. The type
value indicates the type of dial peer
(for example, POTS or VoIP).
destination-pattern
telephone_number
The destination-pattern command,
entered in dial peer subconfiguration
mode, defines the telephone number
that applies to the dial peer. A call
placed to this number will be routed
according to the configuration type
and port (in the case of a POTS type
dial peer) or session target (in the
case of a VoIP type dial peer) of the
dial peer.
portport-number The port command, entered in POTS
dial peer subconfiguration mode,
defines the port number that applies
to the dial peer. Calls that are routed
using this dial peer are sent to the
specified port. The port command
can be configured only on a POTS
dial peer.
session target ipv4:ip-address The session target command, entered
in VoIP dial peer subconfiguration
mode, defines the IP address of the
target VoIP device that applies to the
dial peer. Calls that are routed using
this dial peer are sent to the specified
IP address. The session target
command can be configured only on
a VoIP dial peer.
QUESTION 29:
You need to determine the correct ports to use on a new Cisco router which will be
used as a VOIP gateway. Which two statements are true about voice ports on a
router? (Select two)
A. Calls made to the PSTN can be made via FXS or T1/E1 trunk ports.
B. Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk
ports.
C. Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.
D. Calls between analog phones that are attached to the FXS ports in a VoIP network can
be completely processed by voice-enabled routers.
Answer: C, D